Boiler-cleansing apparatus.



No 7s1,654. PA'TBNTED JUNE 7, 1904. momma a; J. w. EATON:-

' BOILER OLE'ANSINGIAPPARATUS.

APPLICATION! FILED 001.15, 1903.

INVENTORS, 10 em A mm x PnmaL'lmn, wAsHmcTon a c UNITED STATES Patented Tune '7, 1904;

PATENT OFFIGEQ BOILER-CLEANSING APPARATUS..-

SPEGIFIGATION forming part of Letters Patent No. 761,654, dated June '7, 1904.

apparatus, the same being more particularly designed as an improvement upon the device for which'Letters Patent of the United States were granted to Joseph Carter October 22, 1878, No. 209,226.

' Our invention consists of the construction, combination, and arrangement of devices hereinafter described and claimed, and illustrated in the accompanying drawings, in which Figure 1 is a view in perspective, illustrating features of our invention. Fig. 2 is a view in vertical cross-section of the device shown in Fig. 1, and Fig. 3 is a view in vertical section of the filter employed in our invention.

Our invention is designed to provide a cleansing apparatus for boilers whereby various impurities from the boiler shall be taken out of the boiler by means of a circulation established by our improved apparatus, the impurities taken out of the boiler by our apparatus being conducted into the base of a filtering device through whichthe water drawn off from the boiler shall return into the boiler,the filtering device removing the impurities therefrom which are designed to be removed from the boiler, the water being returned by the circulation established in the boiler, our apparatus also being provided with means whereby the filtering device may be readily cleansed. The device embodied in said patent was found to be unsatisfactory in its operation, often proving an entire failure for lack of a proper circulation through the cleansing apparatus and for other reasons. As the result of continued and various experiments along this line the defects existing in the apparatus embodied in .said patent have, been found and corrected by Application filed. October 15, 1903. Serial No. 177,102. (No model.)

the combination of devices embodied in this present application, our present apparatus proving every way efficient and satisfactory for the purpose of steam-boiler cleansing,

while it may also be'readily and easily applied. V y

We carry out our invention as follows:

In the drawings, (1 represents a boiler, and 6 represents the boiler inclosure or wall. A filter-receptacle is indicated at 0, into which enters an ejector or draw-off pipe, (indicated at (L) the inner end of which preferably extends into the boiler to about the water-line, so as to carry off the floating scum or other impurities on the surface of the water. This draw-off pipe d is led into the filtering-chamber c and discharges into a chamber 0 at the base of the filtering device, above which discharge-chamber is located any suitable filtering material, as indicatedatf. The drawoff pipe cl terminates in a cone-shaped discharge-nozzle, as indicated at g, the coneshaped nozzle serving as a spreader to throw Y thewater and accumulated scum or impurities toward the lnner clrcumference of the discharge-chamber 6, whereby the water and 1ts impurities are thus deflected or spread in such a manner as to be distributed more effectually within the discharge-chamber of the filtering device, and it has been found that without the employment of this cone-shaped spreader or nozzle 9 the impurities collected about the lower end of the pipe CZ in such a manner as to often clog the filtering device and prevent 'its efiicientoperation, and we have found that be heated Outside of the inclosing wall of.

the boiler the pipe h is deflected downward, as indicated at c', so that at the point 41 the return or ejector pipe shall be lower than the filtering device and lower than the inner or discharge end of the pipe h. We do not limit ourselvesto any precise way of connect- IOO ing the return or ejector pipe into the boiler or to any precise way in which heat shall be applied to said pipe; nor do we limit ourselves to the particular manner shown of deflecting or lowering the said return-pipe between the filtering device and the discharge end of the pipe; but we have found it essential to establish proper circulation, so that the return-pipe it at some point between the filtering device and the inner end of said pipe shall be lower than the extremities of said return-pipe. This lowering of the return-pipe at some point between its extremities forms, as will readily be seen, practically a trap, which, together with the other features of the device, will effectually prevent any liability of a backfiow of water through said return-pipe h. We have shown the return-pipe /L inside the inclosure wall as rising at an angle to the point of its entrance into the boiler. This, however, is not essential, inasmuch as the dropping or lowering of said pipe outside the wall between the extremities of the pipe forms the necessary trap to control the direction of circulation. It will readily be seen that the heat applied to the inner end of the return-pipe causes the water to rise in said pipe, this rising of the heated water establishing a circulation through the boiler and through the filtering device by means of the pipes (Z and h, leading to and from the filtering device.

To effectually prevent any liability of the backflow of water in the pipe it, the bend or drop in the pipe, as indicated, for example, at i, must be below the discharge end of the pipe, this drop or trap, as already explained, being between the filtering device and the discharge end of said pipe.

Another important feature of our invention consists in providing the return-pipe [L with means to. contract or diminish the stream fiowing through said pipe. We have shown in order to accomplish this result a valve j, located in the pipe h at any suitable point, whereby the area of the return-pipe /& at this point may be reduced or nozzled down. We do not limit ourselves, however, to any particular means to secure this reduction. A suitable valve, however, enables us to accomplish this result in a ready and etficient manner. By the employment of any suitable means to this end it will be readily seen such a contraction may be secured at the point of the reduction in said pipe as to effectually prevent any liability of backfiow of water in the pipe 7L. A valve 7c is also interposed in the pipe (Z to control the same. The filtering device is furthermore provided with any suitable vent, as a valve, (shown at Z.) Above the filtering material f in the filtering device is preferably formed a chamber 17?, communicating with the return-pipe 7L and with the vent Z. It will readily be seen that by closing the valve in the pipe (Z and opening the valve in the discharge-pipe a the filter may be blown off or cleansed by means of water, in this event returning from the boiler through the pipe le After the cleansing of the filtering device has been accomplished to restore the circulation through the filter back again into the boiler the vent Z and the valve Z are opened; otherwise water passing through the heated pipe l1 will form gas and steam to prevent the filter from filling with water il the vent 47 be not then open. The same op eration is required in first filling the filter with cold water, as the air would not allow a filter of this construction to be filled with water unless there was a vent for the air, and

unless the filter fills with water there can be no circulation. After the air has been discharged from the filter and circulation established therethrough the vent is again closed. By reversing the fiow of water through the pipe 70 into the filter above the filtering material and discharging the same through the discharge-pipe w it will readily be seen that the filtering material may thus be readily cleansed. The ejector-pipe (Z might, if desired, be provided with one or more drawoll' pipes leading thereinto.

We do not limit ourselves to any particular construction of the filtering devices other than it is desirable to have a settling or sediment chamber in the lower end thereof, the filtering devices being preferably provided with a, chamber m, as described, at its upper end.

W e prefer to locate the valve toward the inner end of the pipe it adjacent to its entrance into the boiler, as this location allows the pipe h to be full of water until it is where it passes through the fire-box.

Our present improvements consist in the general construction, combination, and arrangement of the various devices hereinbel'ore described and embrace more particularly the provision of the spreader at the lower end of the draw-off pipe, the provision of the vent whereby steam or air, as the case may be, may readily be discharged from the filtering device, and means for reducing at any suitable point the channel through the pipe it, together with the lowering or drop of the pipe It at a suitable point between its extremities below the discharge end of said pipe to elliciently cause the heated water to rise in the pipe /1/ when heat is applied thereto, the reduction in the pipe lb causing a more forceful stream or a greater pressure to fiow through the pipe at the point of reduction to prevent any backfiow. The operation of our invention will now be clearly understood.

WVhat we claim as our invention is 1. In a boiler-cleansing apparatus a filtering device provided with a perforated dia phragm toward its base and with filtering material therein above said diaphragm, a d rawoff pipe leading from the boiler into the filtering device and through the filtering material therein and opening into the lower end of said filtering device,-below said diaphragm, a valve in the draw-off pipe, a spreader at the base of the draw-off pipe, a return-pipe communication with the top of the filtering device and leading into the base of the boiler, means to reduce the channel in the return-pipe between the filtering device and the boiler, and a vent independent of the return-pipe eommunicat ing with the upper portion of the filtering device for the discharge of air or steam from the filtering device, said return-pipe dropped or lowered at a point intermediate its extremities below the discharge end of the return-pipe, the filtering device being provided with a discharge-nozzle, the liquid discharged into the lower portion of said device filtering upward into the upper portion of said device.

2. In a boiler-cleansing apparatus, a filtering device provided with filtering material therein and with a chamber in the lower end of said device, a draw-off pipe leading from the boiler into the filtering device and through the filtering material therein and opening into said chamber, a valve in the draw-off pipe, a spreader at the base of the draw-off pipe within said chamber, a return-pipe communication with the top of the filtering device and leading into the base of the boiler, means to.

reduce the channel in the return-pipe between the filtering device and the boiler, and an independent vent communicating with the upper portion of the filtering device for the discharge of air or steam from said device, said return-pipe dropped or lowered at a point intermediate its extremities below the discharge end of the return-pipe, the filtering device be ing provided with adischarge-nozzle, the low-v ering of the pipe being exterior to the boilersetting, the liquid discharged into the lower chamber of said device filtering upward into the upper portion of said device.

3. In a boiler-cleansing apparatus a filtering device provided with a perforated diaphragm toward the bottom of the device forming a chamber below the diaphragm, filtering material located above the diaphragm, a drawoff pipe leading from the boiler throughthe filtering material into the lower chamberof the filtering device and discharging into said lower chamber, a spreader at the lower end of the draw-off pipe, a return-pipe communieating with the upper chamber of the filtering device and leading through the fire-box into the boiler, means to reduce the channel through the return-pipe, and an independent vent for the upper chamber of the filtering device, said return-pipe outside the fire-box dropped or extended below the discharge end of the return-pipe to form a trap, the diaphragm spaced from the spreader leaving a free passage about the body of the spreader, the liquid discharged into the lower chamber of said'device filtering upward into the upper portion of said device.

4. In a boiler-cleansing apparatus a filtering device provided with filtering material therein and with a chamber in the lower end of the device, a draw-off pipe leading from the boiler into the chamber at the lower end of said device, a valve in the draw-off pipe, a spreader in the lower chamber constructed to deflect the matter discharged into the lower chamber-about the periphery of the spreader, a return-pipe communicating with the upper portion of the filtering device and leading into the base of the boiler, and an independent vent communicating with the upper portion of said device for the discharge of air or steam therefrom, the return-pipe provided with means to reduce the channel therethrough.

5. In a boiler-cleansing apparatus, afiltering device provided with a perforated diaphragm toward its lower end, with filtering material located above said diaphragm, a draw-off pipe leading from the boiler into said chamber, a valve in the draw-off pipe, a return-pipe communicating with the upper end of the filtering device and leading into the base of the boiler, a vent communicating with the upper portion of said device for the discharge of air or steam therefrom, the return pipe provided with means to reduce the channel therethrough and prevent any backflow of water into the heated return-pipe.

In testimony whereof we have signed this specificat1on 1n the presence of two subscribing witnesses. JOSEPH CARTER.

JOSEPH W. EATON. Witnesses:

L. M. COLE,

DAVID CHAPEL. 

